Posted on 11/30/2017 7:21:13 AM PST by Red Badger
Global warming has not accelerated temperature rise in the bulk atmosphere in more than two decades, according to a new study funded by the Department of Energy.
University of Alabama-Huntsville climate scientists John Christy and Richard McNider found that by removing the climate effects of volcanic eruptions early on in the satellite temperature record it showed virtually no change in the rate of warming since the early 1990s.
We indicated 23 years ago in our 1994 Nature article that climate models had the atmospheres sensitivity to CO2 much too high, Christy said in a statement. This recent paper bolsters that conclusion.
Christy and McNider found the rate of warming has been 0.096 degrees Celsius per decade after the removal of volcanic cooling in the early part of the record, which is essentially the same value we determined in 1994 using only 15 years of data.
The study is sure to be contentious. Christy has argued for years that climate models exaggerate global warming in the bulk atmosphere, which satellites have monitored since the late 1970s.
Christy, a noted skeptic of catastrophic man-made global warming, said his results reinforce his claim that climate models predict too much warming in the troposphere, the lowest five miles of the atmosphere. Models are too sensitive to increases in carbon dioxide concentrations in the atmosphere, he said.
From our observations we calculated that value as 1.1 C (almost 2° Fahrenheit), while climate models estimate that value as 2.3 C (about 4.1° F), Christy said.
While many scientists have acknowledged the mismatch between model predictions and actual temperature observations, few have really challenged the validity of the models themselves.
A recent study led by Lawrence Livermore National Laboratory climate scientist Ben Santer found that while the models ran hot, the overestimation was partly due to systematic deficiencies in some of the post-2000 external forcings used in the model simulations.
Christys removal of volcanic-driven cooling from satellite temperature data could also draw scrutiny. The study also removed El Nino and La Nina cycles, which are particularly pronounced in satellite records, but those cycles largely canceled each other out, the co-authors said.
Christy said his works shows the climate models need to be retooled to better reflect conditions in the actual climate, while policies based on previous climate model output and predictions might need to be reconsidered.
Two major volcanoes El Chichon in 1982 and Pinatubo in 1991 caused global average temperature to dip as a result of volcanic ash, soot and debris reflecting sunlight back into space.
Those eruptions meant there was more subsequent warming in the following years, making the rate of warming appear to be rising as a result of man-made emissions or other factors, Christy said.
Those eruptions happened relatively early in our study period, which pushed down temperatures in the first part of the dataset, which caused the overall record to show an exaggerated warming trend, Christy said.
While volcanic eruptions are natural events, it was the timing of these that had such a noticeable effect on the trend. If the same eruptions had happened near the more recent end of the dataset, they could have pushed the overall trend into negative numbers, or a long-term cooling, Christy said.
Man caused global warming as result of higher CO2 levels from burning fossil fuel is the dogma of the climate change cult and not based on any true science. This research again shows CO2 driven global warming to be total bunk and based on manipulation of computer models not real world data.
“1) Volcanic activity skewed the data . . . less human influence when adjusted”
No no no. It’s the human influence which caused the volcano in the first place.
Does anyone believe that a single global temperature measurement can be made to a precision or accuracy of less than 0.1 Celsius degree?
= = =
Of course.
My car has a temperature display in the corner of the rear view mirror, and the local dentist’s sign confirms it.
No no no . . . it was the human influence who killed the dinosaurs that angered the Titans who then slaughtered the Philistines who THEN angered the volcanoes . . . get your timeline right!!!
And yet trying to hold a rational discussion about this with brainwashed people is futile. Im going to start asking the names of scientists they are relying on for their die hard belief in this crap. Theyll have no names to share which in and of itself should shed light...I hate this bs movement that hurts so many people.
Full Arctic parka and a G-string?
These are the same people who think there are more than two Sexes.
Computer models vs real data.
Good stuff, thanks!
DMSP satellite. No global warming but there has been cooling. Monitoring Earth’s weather since 1962.
Computer models are video games for grad students......................
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